On Fri, Feb 21, 2025 at 11:56:32AM -0800, Nuno Das Neves wrote: > Running in the root partition is a unique and specialized case that > requires additional code. CONFIG_MSHV_ROOT allows Hyper-V guest kernels > to exclude this code, which is important since significant additional code > specific to the root partition is expected to be added over time. > > To do this, change hv_root_partition to be a function which is stubbed out > to return false if CONFIG_MSHV_ROOT=n, and don't compile hv_proc.c at all, > stubbing out those functions with inline versions. > > Store the partition type (guest or root) in an enum hv_curr_partition_type, > which can be extended beyond just guest and root partition. > > While at it, introduce hv_result_to_errno() to convert Hyper-V status codes > to regular linux errors. This is useful because the caller of a hypercall > helper function (such as those in hv_proc.c) usually can't and doesn't > interpret the Hyper-V status, so it is better to convert it to an error code > and reduce the possibility of misinterpreting it. This also alows the stubbed > versions of the hv_proc.c functions to just return a linux error code. > > Signed-off-by: Nuno Das Neves <nunodasneves@xxxxxxxxxxxxxxxxxxx> No need to sign this off. :-) > > Nuno Das Neves (3): > hyperv: Convert hypercall statuses to linux error codes > hyperv: Change hv_root_partition into a function > hyperv: Add CONFIG_MSHV_ROOT to gate root partition support > Applied to hyperv-next. Thanks.
